Layout Analysis Help

CITlab Advanced Layout Analysis Method

Neural Net setting

Allows to choose a specific neural network to be used for finding lines and regions. Choose “Preset” if you are not sure about the options or when working on a new dataset.


Only available for the “Preset” neural networks.

  • Text orientation:
    • Default: it is assumed that all present text is 0° oriented
    • Homogeneous: it is assumed that the text is homogeneously oriented. All text lines have the same orientation: 0°, 90°, 180° or 270°
    • Heterogeneous: text could be oriented heterogeneously, a mix of 0°, 90°, 180° and 270° is possible. Text lines with the same orientation are clustered in the same text regions.
  • Use seperators:
    • Default: within a given text region/cell region do not use seperators. If no regions are given, use them.
    • Always: uses seperators also within given regions/cells
    • Never: never uses separator information
  • Region grouping:
    • Cluster lines: group lines into separate text regions
    • Single bounding-box: just draws one big text region around all resulting lines